﻿<!DOCTYPE html>
<html>
<head>
  <title>Parallel Layout</title>
  <!-- Copyright 1998-2021 by Northwoods Software Corporation. -->
  <meta name="description" content="TypeScript: A custom Layout that arranges a collection of nodes and links where there is a single 'split' node and a single 'merge' node, and all nodes are in paths of links that come from the 'split' node and go to the 'merge' node." />
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
</head>
<body>
  <div id="sample">
    <div id="myDiagramDiv" style="border: solid 1px black; background: white; width: 100%; height: 500px"></div>
    <p>
      This sample demonstrates a custom <a>TreeLayout</a>, ParallelLayout,
      which assumes that there is a single "Split" node that is the root of a tree,
      other than links that connect with a single "Merge" node.
      The layout is defined in its own file, as <a href="ParallelLayout.ts">ParallelLayout.ts</a>.
    </p>
    <p>
      Both the <a>Diagram.layout</a> and the <a>Group.layout</a> are instances of ParallelLayout,
      allowing for nested layouts that appear in parallel.
    </p>
  </div>

  <script type="module" id="code">
    import * as go from "../release/go-module.js";
    import { ParallelLayout } from './ParallelLayout.js';

    if (window.goSamples) window.goSamples(); // init for these samples -- you don't need to call this
    const $ = go.GraphObject.make; // for conciseness in defining templates

    const myDiagram = $(go.Diagram, 'myDiagramDiv', // must be the ID or reference to div
      {
        allowCopy: false,
        allowDelete: false,
        layout: $(ParallelLayout, { layerSpacing: 20, nodeSpacing: 10 })
      });

    // define the Node templates
    myDiagram.nodeTemplate =
      $(go.Node, "Auto",
        { locationSpot: go.Spot.Center },
        $(go.Shape, "Rectangle",
          { fill: "wheat", stroke: null, strokeWidth: 0 }),
        $(go.TextBlock, { margin: 3 },
          new go.Binding("text"))
      );

    myDiagram.nodeTemplateMap.add("Split",
      $(go.Node, "Auto",
        { locationSpot: go.Spot.Center },
        $(go.Shape, "Diamond",
          {
            fill: "deepskyblue", stroke: null, strokeWidth: 0,
            desiredSize: new go.Size(28, 28)
          }),
        $(go.TextBlock,
          new go.Binding("text"))
      ));

    myDiagram.nodeTemplateMap.add("Merge",
      $(go.Node, "Auto",
        { locationSpot: go.Spot.Center },
        $(go.Shape, "Circle",
          {
            fill: "deepskyblue", stroke: null, strokeWidth: 0,
            desiredSize: new go.Size(28, 28)
          }),
        $(go.TextBlock,
          new go.Binding("text"))
      ));

    // define the Link template to be minimal
    myDiagram.linkTemplate =
      $(go.Link,
        { routing: go.Link.Orthogonal, corner: 5 },
        $(go.Shape,
          { stroke: "gray", strokeWidth: 1.5 })
      );

    // define the Group template to be fairly simple
    myDiagram.groupTemplate =
      $(go.Group, "Auto",
        {
          layout: $(ParallelLayout, { layerSpacing: 20, nodeSpacing: 10 })
        },
        $(go.Shape, { fill: "transparent", stroke: "darkgoldenrod" }),
        $(go.Placeholder, { padding: 10 }),
        $("SubGraphExpanderButton", { alignment: go.Spot.TopLeft, "ButtonBorder.figure": "Rectangle" })
      );

    myDiagram.model = new go.GraphLinksModel([
        { key: -1, isGroup: true },
        { key: -2, isGroup: true },
        { key: -3, isGroup: true },
        { key: 1, text: 'S', category: 'Split', group: -1 },
        { key: 2, text: 'C', group: -1 },
        { key: 3, text: 'Longer Node', group: -1 },
        { key: 4, text: 'A', group: -1 },
        { key: 5, text: 'B\nB', group: -1 },
        { key: 6, text: 'Another', group: -1 },
        { key: 9, text: 'J', category: 'Merge', group: -1 },
        { key: 11, text: 'T', category: 'Split', group: -2 },
        { key: 12, text: 'C', group: -2 },
        { key: 13, text: 'Here', group: -2 },
        { key: 14, text: 'D', group: -2 },
        { key: 15, text: 'Everywhere', group: -2 },
        { key: 16, text: 'EEEEE', group: -2 },
        { key: 19, text: 'K', category: 'Merge', group: -2 },
        { key: 21, text: 'U', category: 'Split', group: -3 },
        { key: 22, text: 'F', group: -3 },
        { key: 23, text: 'Medium\nTall\nNode', group: -3 },
        { key: 24, text: 'G', group: -3 },
        { key: 25, text: 'AS', group: -3 },
        { key: 26, text: 'H\nHH\nHHH', group: -3 },
        { key: 27, text: 'I', group: -3 },
        { key: 29, text: 'L', category: 'Merge', group: -3 },
        { key: 101, text: '0', category: 'Split' },
        { key: 107, text: 'ABCDEFG' },
        { key: 109, text: '*', category: 'Merge' }
    ], [
        { from: 1, to: 2 },
        { from: 2, to: 3 },
        { from: 3, to: 4 },
        { from: 4, to: 9 },
        { from: 1, to: 5 },
        { from: 5, to: 6 },
        { from: 6, to: 9 },
        { from: 9, to: 11 },
        { from: 9, to: 21 },
        { from: 11, to: 12 },
        { from: 12, to: 13 },
        { from: 13, to: 14 },
        { from: 14, to: 19 },
        { from: 11, to: 15 },
        { from: 15, to: 16 },
        { from: 16, to: 19 },
        { from: 21, to: 22 },
        { from: 22, to: 24 },
        { from: 24, to: 26 },
        { from: 23, to: 29 },
        { from: 21, to: 25 },
        { from: 25, to: 23 },
        { from: 21, to: 27 },
        { from: 26, to: 29 },
        { from: 27, to: 29 },
        { from: 101, to: 1 },
        { from: 19, to: 109 },
        { from: 29, to: 107 },
        { from: 107, to: 109 }
    ]);

    window.myDiagram = myDiagram; // Attach to the window for console debugging
  </script>
</body>
</html>